Lewis and Clark, a legacy of science.

Shows facsimile of Lewis and Clark exploration map and contemporary physical map of approximately the same geographic coverage.Relief shown by hachures on facsimile map. Relief shown by shading and gradient tints on contemporary physical map."The original Lewis and Clark map has been digitally enhanced and prepared by the U.S. Geological Survey. Reproduced from the original held in the Library of Congress, Geography and Map Division."Prime meridians on facsimile map: Washington, D.C. and London.At lower right corner: Rebecca Garcia, Bruce Boman & John Kosovich.Includes text and ill. (chiefly col.).A map of Lewis and Clark's track across the western portion of North America, from the Mississippi to the Pacific Ocean by order of the executive of the United States in 1804, 5 & 6 / copied by Samuel Lewis from the original drawing of Wm. Clark ; Saml. Harrison, fct. -- A map of Lewis and Clark's track across the western portion of North America, from the Mississippi to the Pacific Ocean / produced by the United States Geological Survey from elevation data in the national map.Facsimile map originally published: Philadelphia : Bradford and Inskeep, 1814